Panel 1
It appears that each time the Splitter is used, it takes time to recharge, so it must have massive capacitors to store the charge.
Panel 2
Interestingly JACK seems sanguine about the fact that if the past is changed he might cease to exist.
Panel 3
I was wondering why TORRES didn't just eliminate JUNIOR HENDERSON in the original transport, this explains it.
Panel 4
TORRES also realises that her's is a suicide mission.
Panel 5
TORRES is super-smart and seems to have done everything she can to get a successful outcome to the mission, including the fact that JACK could be convinced to switch loyalties.